Polishing-wheel for stone.



sAMUEL HOBERT MILLs7 onMoNTPEiER, vERMoNT.

PoLIsH-ING-.WHEE FOR sToivE.

specification of LettersV Patent.

' Pat'ented Aug. IO, 1909;v

Application fiied October 28,,11908'. sriaina 459,191,

To all whom it 'may concern:

Be it known that I., SAMUEL HOBER MiLLs, a citizen of the UnitedStates, residing at Montpelier, in the county of Vashington and State of Vermont, have invented a new and useful Polishing-Wheel for Stone, of which the following is a specification.

This invention relates to Wheels for dressing and polishing stone and more particularly to a polishing wheel especially designed Vfor emerying the surface of stone.

The object of the invention is to provide a polishing wheel having a' plurality l of surface fianges of different configuration for feeding emery or other abrading material fat varying speeds across the surface being operated upon. j

A further object is to provide the active face of the wheel with a marginal fiange of scroll formation for produoing a rapid cut, and furthcr to arrange a series of segmental flanges within the scroll and concentric to the axis of thewheel for producing a relatively slow cut, thereby to impart, the (lesired polish to the surface of the stone.

A still further object of the invention is generally to improve this class of devices so as to increase their utility, durability and efliciency.

Further objects and advantages will ap? ear in the following description, it being understood that various changes in form, proportions and minor details of construction may be resorted to within the scope of the appended claims.

In the accompanying drawings forming a part of this specification Figure '1 is-a loottom plan view of a stone polishing wheel constructed in accordance with my invention. Fig. 2 is aV side elevation of the same. Fig. 3 is a top plan view. Fig. lis a detail side elevation, of a portion of the wheel with the marginal scroll flange removed.

Similar numerals of reference indicate corresponding parts in all of the figures of the drawings.

The improved polishing wheel forming the subject matter of the present invention comprises a marginal supportingv ring 5 preferably formed of metal and reinforced and strengthened by a transverse bar 6 having spaced cars 7 extending laterallytherefrom and forming an intermediate socketfor the reception of the adj acent end of an Operating shaft, said wheel being secured tothe operating shaft` by a transverse pin or similar fastening device, indicated at 8. I Secured to or formed integral with the lm-arginal ring 5V are a plurality of' peripheral abrading flanges or ribs 9 of scroll formation, said'` fla-nges having their opposite ends inclined or beveled at 10 and adapted to direct the emery or other abrading material toward the center of the wheel.

Disposed concentric with the Vertical axis of the polishing wheel are a series of segmental ribs or flanges 11 each having its opposite ends reduced in width and also inclined or beveled, as shown at 12, to permit the emery or otherabrading material to pass between and under said flanges at their tapered ends and toward the center of the wheel and thus prevent the emery from oalring and clogging the active faceof said polishing wheel. The adjacentl ends of the concentric flanges 11 are connected by bridge plates 13 which may or may not be integral with the said flanges vas may be desired. U

By making the outer flanges 9 of scroll formation and the inner fianges 11 concentric with the Vertical aXis of the wheel, a double feed of the emery or other abrading material is obtained, the outer scroll causing the emery to cut very fastv and the concentric flanges 11 causing a relatively slow cut so as to give the surface ofthe stone the desired polish. It will thus be seen that the scroll flanges 9 draw the emery or other scouring` material toward the center of the wheel where it is made `lto pass the concentric flanges 11 so that the abrasive will gradually work toward the center, growing finer Vas it passes, thereby cutting and polishing the stone and performing the Work much faster than the ordinary polishing Wheels, the abrading fianges of which are either all of scroll formation or all disposed concentric with the aXis of the wheel. It will also be noted that this construction permits the coarse emery to be brought in contact with the outside flanges first and thus receive the initial wear, while the concentric fianges cause the abrading material to travel relatively slow in the direction of the center of the wheel to polish the stone, as before stated.

' A guardring 14 is preferably secured to the marginal ring 5 to form a guard for the wheel and thus prevent the latter from cutting into the frame which' surrounds the stone during the cutting operation. i

z mation secured to the supporting ring, and 8, plurality of flanges disposed concentric With the Vertical axis of the Wheel and having their opposite ends spaced apart and inclined or beveled, bridge pieces connecting the inclined ends of the concentric fizmgcs, there being openings forined in the wheel between the several concentric fianges and between said concentric fiangos :in d the Scroll fianges.

' In testimony that I claim the forcgoing :is my own, I have hereto afiixed my signature in the presence of two witnesses.

SAMUEL HOBERT MILLS.

VVitnesses BENJAMIN GATES, ISABEL T. CHASE. 

